8/11/2019 I - Louvers

1/10

A I R D I S T R I

BUTION S P E C I L I S T

-

LOUV RS

GL Wall Gravity Louvers

EAL

Exhaust Air Louvers

FAL

Fresh Air Louvers

FL Filter Louvers

STL

Sand

Trap Louvers

FAISAL JASSIM

INDUS

TRIES L.L.C .

P

0

Box: 187 I Dubai, U.A.E.

Tel: +971 4 58 264

Fax:+971 42

5 8 2641

E-ma

il:

flowtech@fjtco.com

Website: vvww.faisalj

ass

im.

ae

vvww.flowtechind.com

8/11/2019 I - Louvers

2/10

IR

D I S T R I B U T I O N

S P E C I L I S T

~

Gravity Louvers GL)

The GL is a wall mounted device that

is

composed

o

a

set

o

horizontally mounted blades that are normally

closed

and are free to

rotate arround the

ir hor

izontal

axis.

Th

is

louver

serves as

a non-return damper

and can be

used at the exit term

in

al

o

exhaust ducts and fans.

Certain pressure is

us

ua

ll

y required before the damper

opens

to

expel the exhaust air which ensures the elimi

nation

o

back now.

The blades are

made

from l

ig

ht

weight

alu

minium

sheets

wh il

e the frame

is made

from extruded

alumini

um.

Rev. 0:2005/ I

Wall Mounted Gravity Louvers GL)

1 1

8/11/2019 I - Louvers

3/10

IR

D I S T R I B U T I O N

SP

E

C I L I S

T

Free area

ratio =

0.8 I for I 00 open b lades.

To

ca

lculate

the

air

fl

ow

rate

ir flow= 0 81 X Neck area X Face Velocity

0..

0

'-

Q

'-

::I

VI

VI

Q

'-

a

0.0

ro

o...fj

lf)l'

0

~

7

~

(V)cj

oro

q

0

o( ;

- c j

0

0

0

io '

0.5

1.0

1.5

2.0 2.5

3.0

100 200 300 400 500 600

.. . .

3.5

700

4.0

800

Face Velocity Based on Width A) X Height

B)

... ...

V

5

.0

1000

m/s

fpm

- Performance Chart

of

Gravity Louver

GL

12 Re

v

0:2005/ I

8/11/2019 I - Louvers

4/10

LO T E H

A

IR

D IS T R I B U T I O N

S P E C I L I S T

The EA L

is

a weath

er

proof extern

al

cover for air

in

lets

and discharge ope

nings,

suitable for most external

wal

ls

and screening appl ications.

The

EAL

is composed

of

frame and horizontal blade

assembly, manufactured from high qua

li

ty extruded

aluminium profiles. Blades are fixed rigidly

to the

main

frame by rivets and sets at ang le of 45deg

to

the

horizontal with 40 mm spacing

to

inclined downward

to

protect aga inst rain water.

Rev

.0:2005/ I

Q

N

lfl

)

Q

t >

lfl

j

I I

j

J

Exhaust Air Louver

EL)

r

:

E:

C

.....-